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How Hybrid Air Vehicles Is Making World’s Longest Aircraft Longer

Flying Magazine

READ MORE: Airlines and Pilots Don’t See Eye to Eye on Autonomous Flights Aerodynamic lift and vectored thrust come from two pairs of ducted propellers running on kerosene-powered engines, mounted outside the main hull. But with a top speed of 70 knots indicated airspeed (IAS), its velocity is more comparable to a shipping vessel.